diff --git a/include/why2.h b/include/why2.h
index e14bd06..a09d625 100644
--- a/include/why2.h
+++ b/include/why2.h
@@ -30,6 +30,7 @@ extern "C" {
 #endif
 
 //CORE
+#include <why2/crypto.h>
 #include <why2/decrypter.h>
 #include <why2/encrypter.h>
 #include <why2/flags.h>